Long-tailed Skua vs Pomarine Skua

In short

The Long-tailed Skua and Pomarine Skua can be distinguished primarily by their tail and size. The Long-tailed Skua has elongated central tail feathers, especially in adults, while the Pomarine Skua is bulkier with a more robust build and lacks such distinctive tail feathers.

Identification tips

1. Tail Feathers: Look for elongated central tail feathers in adult Long-tailed Skuas. 2. Size and Build: Pomarine Skuas are larger and bulkier. 3. Flight Pattern: Observe the flight; Long-tailed Skuas are more agile. 4. Group Behavior: Pomarine Skuas may be seen in small groups, especially during migration.

Size

The Pomarine Skua is larger and more robust compared to the more slender Long-tailed Skua.

Plumage

Long-tailed Skuas have elongated central tail feathers in adults, which are absent in Pomarine Skuas. Pomarine Skuas exhibit a bulkier appearance with broader wings and a thicker neck.

Behaviour

Long-tailed Skuas are more often seen singly during migration, while Pomarine Skuas can be observed in small groups. Both species exhibit kleptoparasitic behavior but Pomarine Skuas are more aggressive.

Habitat

Long-tailed Skuas breed on dry tundra and migrate over open ocean, rarely near shore. Pomarine Skuas also breed in the Arctic but are more localized and episodic in their breeding habits.